import Vue from 'vue';
import VueRouter from 'vue-router';
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
// import { component } from 'vue/types/umd';
import welcome from '../components/Welcome.vue'
import User from '../components/user/User.vue'
Vue.use(VueRouter)

const routes = [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    {
        path: '/home',
        component: Home,
        redirect: '/welcome',
        children: [
            { path: '/welcome', component: welcome },
            { path: '/users', component: User }
        ]
    },
]

const router = new VueRouter({
    routes
})

// 挂载路由导航守卫,to表示将要访问的路径，from表示从哪个路径，next是下一个要做的操作 next('/login')强制跳转login
router.beforeEach((to, from, next) => {
    // 访问登录页，放行
    if (to.path === '/login') return next()
        // 获取token
    const tokenStr = window.sessionStorage.getItem('token')
        // 没有token, 强制跳转到登录页
    if (!tokenStr) return next('/login')
    next()
})

export default router